I used to have a job that was a rotating shift job as a supervisor in a factory...... I hated that part of the job. 

Then, somebody up the chain a few links decided to go to 12 hr shifts for the supervisors. 3 days on 3 days off.... 12 hrs. after 7 cycles, you swapped from days to nights and did 7 cycles before swapping again. 

That schedule was actually a bit more tolerable. It beat the rotating shift the peons workers were on. 

The neat thing was vacations ended up being 9 days off.... and, I don't know how this happened but it did.... I ended up having 42 days in a row off. Yup 42 lovely paid days off.  There was a plant shutdown for maintenance, a vacation, a company "bonding" event, and a few other things that when combined with my off time, amounted to 42 days of not having to work. All of these miscellaneous events were coincidentally scheduled by the plant management on the days I was supposed to be working.... including the company sponsored and paid for "bonding event" at Myrtle Beach SC...... I was the only one who benefited from that schedule in that manner... and this was in the first year they put us on it. 4 people in the plant had this 3/3 schedule and I was one of them. My supervisor worked the day shift 8 hrs only and I remember him shaking his head after I was back at work and he and I were talking about the fact that he hadn't seen me much in the past month and a half.  One of those things where the planets were all in alignment..... 

Anyway... it didn't last long.... I was out for my normal 3 days off and missed the "staff review" that occurs for all staff on a yearly basis. My first hour back, my supervisor told me to go see the plant VP for my review. 30 minutes later I had been fired, and escorted off the plant property...... Oh well, it was good while it lasted..... so I went home and started my own business and have never had to work an overnight shift again...or been fired.